Change the webftp and webmail
Please it's possible change the webftp to ajaxplorer (http://ajaxplorer.info/) And the webmail to roundcube (http://roundcube.net/) This are userfriendly and good to use, many users say this is standard for he/she.
I think this isn't nothing hard to do, at first is idea, then you can do it. I read many articles about this softwares and user panels and this isn't unreal. One panel (i-mscp) have ajaxplorer already.